A=[4.5 3.1; 1.6 1.1];
x1=inv(A)*[19.249; 6.843]
x2=inv(A)*[19.25; 6.84]

eps1=abs(x1(1)-x2(1))/abs(x1(1))*100
eps2=abs(x1(2)-x2(2))/abs(x1(2))*100
